<!DOCTYPE html>
<html lang="cn">
<head>
    <meta charset="UTF-8">
    <title>边框</title>
    <style type="text/css">
        div {
            width: 300px;
            height: 300px;
            border-top: black dashed 10px;

            border-left-color: yellow;
            border-left-style: dotted;
            border-left-width: 10px;

            border-right: pink double 10px;

            border-bottom: aqua solid 10px;
            
            border-radius: 150px;
        }
    </style>
</head>
<body>
<div></div>
</body>
</html>

